Chemistry-(general)
NEET Chemistry (general) MCQ Question
Type: MCQ-diagram based-Medium-Class 11
Consider a diagram of a galvanic cell where sodium (Na) undergoes oxidation. Which of the following correctly labels the anode, where the oxidation half-reaction occurs?
A
2 Na (s) → 2 Na⁺ (g) + 2e⁻
B
2 Ag⁺ (aq) + 2e⁻ → 2 Ag (s)
C
H₂O (l) → ½ O₂ (g) + 2H⁺ (aq) + 2e⁻
D
C₆H₅CHO (l) + 2[Ag(NH₃)₂]⁺ (aq) + 3OH⁻ (aq) → C₆H₅COO⁻ (aq) + 2Ag (s) + 4NH₃ (aq) + 2H₂O (l)
Correct Answer
Option A
Detailed Explanation
In a galvanic cell, the anode is where oxidation occurs. The half-reaction 2 Na (s) → 2 Na⁺ (g) + 2e⁻ reflects the oxidation of sodium, identifying the anode.
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